Grinding or lining plates.



E. POSSELT.

GRINDING 0R LINING PLATES.

APPLIOATION FILED FEB. 21, 1914.

2 SHEETS-SHEET 1.

E. POSSELT.

GRINDING 0R LINING PLATES.

APPLICATION FILLED FEB. 21, I914.

Patented Feb. 16, 1915.

2 SHEETS-SHEET 2.

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To all whom it may concern:

Be it known that l, Fauna Fossnnr, a sub ject of the King of Denmark, resldlng ll'l the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Grinding or Lining lPlates, of which the following is a specification.

This invention relates to an improvement in grinding or lining plates, to be used in connection with grinding machines known as ball mills or comminuters, and the object is to cause the heavy or enlar ed end to overlap the small or thin end the ad acent plate.

A further object is in making the plates in two pieces, one of which engages the mill shell, and is of such size that sufliciently large contacting surface is provided which will cause the said piece to be held in a fined position on the shell, thereby overcoming an objection to the grinding plate which has been in use. This piece or member has another member mounted thereon, which is preferably of a harder metal, and the two pieces are connected together by means of bolts which fasten the said members to the mill shell so that they are securely fastened together and secured to the mill shell for preventing any possibility of the member which engages the mill shell moving.

Another object is in having the upper member removable so that it can be removed at any time, thereby decreasing the cost of the upkeep of the grinding plates. The upper member relieves the wear and strain imparted to the member which engages the mill shell by the constant action of the balls which are under the present construction received almost entirely upon the upper member. Furthermore,this upper member causes a more even distribution of the strain by the co stant action of the balls, and does not distoi t the shape of the grinding surface.

l'rrthe accompanying drawings: Figure 1 is a longitudinal vertical sectional view showing the plates applied to the shell or casin of a mill; Fig. 2 is a top plan view of the pTate; Fig. 3 is a top plan view of the block; and Fig. dis an end view of the block.

A, represents the mill casing or shell, and

B represents the plates mounted upon the shell, which may be constructed of ordinary soft steel. An anvil block (3 is received in a recess 1 formed in the upper surface of the late B. A plurality of holes 3 are formed in the plate B, and a plurality of holes 4t are formed in the block C which are ada ted to be brought into registry with the ho es 3 of the plate B. Bolts 2 are received in the holes 4 and 3 of the block and plate, and pass through the casing or shell A. The heads of the bolt are countersunk in countersinks formed in the holes 4. Nuts 5 are screwed upon the ends of the bolts for locking the block and plate to the casing or shell A. The bolts 2 are'provided with Webs 6 which fit into slots 7 in the walls of the holes A which prevent the bolts from turning. These bolts prevent any lateral movement of the blocks due to the action on the same of the load in the mill.

Near the heel of each plate B, holes 8 are formed having slots 9 in the wall thereof. Bolts 10 are received in the holes 8 and are countersunk therein in countersinks formed in the holes. The bolts pass through the casing A and are provided with nuts 11 which fasten the plates to the casing. These bolts 10 are provided with webs which enter the slots 9 for locking the bolts against movement. A shoulder 12 is formed at the heelof each plate and the face of the shoul- Patented Feb. lb, mm.

fill

the tapering face of the shoulder 12, so that a true fit is formed between the heel of the plate and the toe of the anvil block, thereby locking the heel of the adjacent plate to the anvil block and preventing movement of the plate. I

From the foregoing it will be seen that the anvil block is mounted upon one end of a plate B, and is fastened thereto by means of bolts 2 passing throughthe block, plate, and casing, whereby the plate is fastened against movement and the heel portion of the adjacent plate is locked against movement by the block overlapping the end or heel of the adjacent plate, .and the toe of the block engaging the shoulder 12 on the constant wear and hard usage received by the plates. Furthermore, by making the blocks of a harder material, such as manganese 'steel, the plates can be made of the ordinary soft' steel, because the blocks will receive the greater part of the wear, and the blocks can be removed whenever necessary. By making the grinding plate in two parts, that is, providing the armor plate and the anvil block, the strain produced on the grinding plate by the constant action of the balls is more evenly distributed, and the action of the balls does not distort the sha e of the grinding surface. The fact that t e anvil block can be renewed whenever desired without renewing the armor plate materially decreases the cost of the upkeep of the grinding plates. Of course in some instances it may be found advisable to make the blocks and plates of a hard steel, such as manganese steel, or it might be made of a like metal, this being tgoverned entirely by. the character of wor or which the mill is intended. s

I claim:

1. The combination of two adjacent lining plates, each having heel and toe portions, an anvil block seated on the toe portion of one plate and on the heel portion of the other plate, and means for connecting'said block and one of the lining plates together.

2. A lining plate formed of a heel and toe portion and having a recess in its upper side in combination with an anvil block detachably seated in said recess and projecting beyond the toe portion of the lining plate, said the heel and toe portion 0 block having a tapering outer face conforming to the tapering face of the anvil plate.

3. In combination two adjacent placed lining plates, each having a recess in its upper face at both its heel and toe portions, an

anvil block seated in the recess of the toe portion of one (plate and the recess of the other plate, an securing means for said block passing through openings therein and in the toe portion of one of said lining plates.

4. The combination with a shell, of a plurality of lining plates mounted thereon, each plate consisting of a base plate and an anvil block, means for locking said block, and base plate to the shell, said block of each plate overlapping and having engagement with the adjacent plate for locking the two adjacent plates to the shell.

5. The combination with a shell, of a plurality of lining plates mounted thereon, each plate consisting of a base plate and an anvil block, means for locking said block, and base plate to the shell, said block of each plate overlapping and having frictional engagement with the adjacent plate for looking the heel and toe portion of the two adjacent plates to the shell.

In testimony whereof I aifix my signature in the presence of two witnesses.

EJNAR POSSELT. Witnesses:

D. EDGAR WILsoN, CHARLES M. HALL. 

